Precision machine and turret lathe stop



Oct. 19, 1954 ROBY 2,691,914

PRECISION MACHINE AND TURRET LATHE STOP Original Filed April 15, 1948 INVENTOR, fussell K. fioy Patented Oct. 19, 1954 UNITED STA TET OFFICE Russell R. Roby, Truro, Iowa Continuation of abandoned application Serial No. 21,128, April 15, 1948. This application April 5, 1952, Serial No. 280,706

1 Claim. 1

This invention relates to a precision machine and turret lathe stop and more particularly constitutes a continuation of my previous application Serial No. 21,128 filed April 15, 1948 and now abandoned, the same having been forfeited for non-payment of the final fee on December 26, 1950.

It is to be understood that turret lathes are equipped by the manufacturers with a stop rod, which is used as a fixed stop for adjustable stop roll pins, with the stop roll located on a lathe carriage; therefore, this is the method used to locate the lathe carriage at the desired position.

An object of this invention is to mount my stop or device on a regular lathe stop rod and when the push rod is contacted by one of the adjustable lathe stop pins, this action moves the push rod lever arm in contact with the dial indicator point until the dial indicator reads the proper pre-set reading; this then gives precision reading of the lathe carriage position, and is one of the advantages of my stop.

Another object of this invention is that this stop or device may be used in combination with a fixed stop to indicate to the operator how hard to push the fixed stop, or on work that does not require precision, my stop can be disregarded and the ordinary lathe fixed stops used exclusively.

With the foregoing and other objects in view, this invention comprises certain novel constructions, combinations, and arrangements of parts as will be hereinafter fully described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claim.

Referring to the drawings:

Figure 1 is a view in elevation of a turret lathe showing my invention attached thereto.

Figure 2 is a top plan view of a device constructed in accordance with the present invention, while Figure 3 is a vertical, longitudinal, sectional view of the same.

Referring to the drawings, in which the preferred embodiment of my invention is illustrated, i designates a lathe, 2 is the lathe carriage, while 3 is the lathe turret. ihe lathe head stock t is mounted upon the lathe l. The lathe is also provided with a lathe stop rod 55. The lathe carriage '2 is provided with a lathe stop roll 5, which stop roll is provided with the diiferent length horizontal stop roll adjusting screws 7.

My invention comprises a stop or device which has a body 8 integral with the casing 9, Fig. 3.

Within the casing 9 is a dial indicator Hi, which can be seen through the glass or transparent sheet A! H. A bezel l2 holds glass II on casing 9. dial indicator is is provided with a point H.

An anvil or mounting section I4 is provided, which comprises an outer threaded portion l5 and an inner threaded portion It. A mounting and adjusting nut H is formed on the section !4 at the inner ends of portions I5 and [6. The smaller outer portion [5 is threaded into stop rod *5, Fig. 1, and a lock nut is is screwed against the stop rod 5, securely fastening the device upon said stop rod 5. The inner end It of the section ill is threaded longitudinally into body 8, with a lock nut 59 pressing against a portion of body 8, whereby the body 8 is securely retained upon portion it against accidental displacement. Within the body 8 is a pocket 20. A push rod 2| extends into body 8 and is slidably mounted thereon. The inner end of push rod 2| is flanged as at 22. Outside of the body 8 and on the outer end of the push rod 2! is a retaining ring 23. A washer 2d and a felt seal 25 are also on push rod 2!. A coil spring 25 is on push rod 2! between washer 24 and retaining ring 23. This spring 25 exerts outward pressure upon retaining ring 23 so as to normally keep the push rod arm '27 free of point l3. This push rod arm 2? is threaded into push rod 2 l. When push rod 2| is struck by one of the screws 1, it will be pushed inwardly, the flange 22 having a slight movement in pocket 26, at the same time the push rod arm 27 engages point i3 and actuates the dial indicator.

The operation of the device is as follows: When the lathe carriage 2 is moved to the left, stop roll adjusting screws l are moved into contact with the push rod 2!, which in turn moves push rod arm 27 to contact dial indicator point 63 and rotate dial indicator hand to proper pre-set posi- The 7 tion for the lathe operation. Other positions of the lathe carriage are accurately made by turning stop roll 6 and repeating this procedure.

While I have described the preferred embodiment of my invention and illustrated the same in the accompanying drawings, certain minor changes or alterations may appear to one skilled in the art to which this invention relates during the extensive manufacture of the same, and I, therefore, reserve the right to make such changes or alterations as shall fairly fall within the scope of the appended claim.

What I claim is:

The combination with a lathe having a bed, a stop rod extending alongside of said bed, a carriage movable along said bed, a stop roll revolvably mounted on said carriage to revolve on an axis parallel to said stop rod, and stop adjusting screws spaced around said axis for movement selectively into alignment with said stop rod; of micrometric stop adjusting means between the proximal ends of the stop rod and the adjusting screw aligned therewith, said micrometric means comprising a supporting member having a nut formed intermediate its ends and having one end screwed axially into the end of the stop rod, said end having a look nut thereon, a sleeve-like body having a bore therethrough, said supporting member having its remaining end screwed into one end of said bore, the remaining'end of said bore being of less diameter than the first end, a lock nut on the end of said member engaging in said bore, a plunger slidably mounted in the smaller end of said bore and having a head on its inner end within the larger end of said bore, spring means urging said plunger outwardly said plunger having its movement adjusted and restricted by said supporting member, an arm projecting radially from said plunger, and a dial indicator supported by said body and having an actuating pin in the path of said radial arm.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,399,045 Kylin Apr. 23, 1946 2,406,793 Benkoe Sept. 3, 1946 2,506,236 Overmyer May 2, 1950 2,592,433 Knosp Apr. 8, 1952 2,604,000 Kjellberg July 22, 1952 OTHER REFERENCES (page 

